Cited by 56Plasmonic and Surface Plasmon ResearchGold and Silver Nanoparticles Synthesis and ApplicationsAdvanced Fiber Optic Sensors

Determining the Interfacial Refractive Index via Ultrasensitive Plasmonic Sensors

Zhan, Chao, Liu, Bo-Wen, Tian, Zhong-Qun, Ren, Bin·2020·Journal of the American Chemical Society

Abstract

Plasmonic sensors are promising for ultrasensitive chemical and biological analysis. However, there are increasing experimental findings that cannot be well addressed by theoretical calculations, including the nonlinear dependence of the plasmonic peak wavelength on the refractive index (RI) and the ultrahigh sensitivity beyond the theoretical limit. The gap between experiments and theoretical calculations is that the bulk RI (BRI) used for calculation could be different from the interfacial RI (IRI) determining the electromagnetic response as a result of the interaction of molecules with the surface. But there is still no method to determine the IRI. Herein, we quantitatively determine the IRI by disentangling the surface RI (SRI) from the BRI. The obtained IRI can be directly applied in theoretical calculations to reliably reflect the experimental response and rigorously guide the design of plasmonic sensors. Moreover, it can be a fundamental dimensionless number to describe the light-matter interaction at the interface.

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Crossref · 10.1021/jacs.0c01907

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  • Plasmonic nanoantennas serve as ultra-sensitive refractometry sensors to capture the refractive index of analytes by wavelength shifts.

    “Thanks to the excellent field confinement at resonance wavelength, plasmonic nanoantennas (PNAs) also serve as an ultra-sensitive refractometry sensor to capture the refractive index of analytes by wavelength shifts (e.g., color change in visible light), which carries the information of physical properties of molecules44,45.”

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Authors
Zhan, C., Liu, B.-W., Tian, Z.-Q., & Ren, B.
Affiliations
  • Xiamen University (CN)
  • State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
Corresponding author
Ren, Bin
Venue
Journal of the American Chemical Society
Published
2020-06-08
Volume
142
Issue
25
Pages
10905-10909
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W3033534775
Cited by
56
References
35
Citations by year
2026: 3 · 2025: 11 · 2024: 5 · 2023: 10 · 2022: 13 · 2021: 11 · 2020: 3
FWCI
2.90
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • Lanzhou University Institutional Repository (submittedVersion)
Funders
  • Ministry of Science and Technology of the People's Republic of China (2016YFA0200601)
  • National Natural Science Foundation of China (21633005, 21711530704, 21790354, 21804061)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Gold and Silver Nanoparticles Synthesis and Applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Fiber Optic Sensors
Keywords
plasmonic sensors, surface plasmon resonance, surface refractive index, sensor sensitivity
MeSH terms
Adsorption, Glycerol, Models, Chemical, Refractometry, Surface Plasmon Resonance

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